Six CTD deployments collected between March 26 and April 14, 2025, during the IMOS Southern Ocean Time Series voyage. Data were acquired using a Sea-Bird SBE911 CTD unit and processed with automated quality control by CSIRO's National Collections and Marine Infrastructure Information and Data Centre. The final conductivity calibration achieved a standard deviation of 0.001185 PSU, meeting the target of better than 0.002 PSU.
Use Cases
- Analyze water column structure based on conductivity, temperature, and depth (CTD) profiles.
- Study biogeochemical properties based on dissolved oxygen, chlorophyll-a, and CDOM sensor data.
- Model ocean physics based on 1-decibar binned averages of pressure, conductivity, and temperature.
- Assess sensor performance and calibration accuracy based on reported standard deviations for conductivity and dissolved oxygen.
Strengths
- Calibrated conductivity data with a standard deviation of 0.001185 PSU, meeting a strict quality target.
- Includes data from six CTD deployments with auxiliary sensors for PAR, CDOM, transmissometer, chlorophyll-a, and scattering.
- Underwent automated quality control to remove spikes and out-of-range values.
- Dissolved oxygen calibration had a standard deviation of 0.64003 μM, with good agreement reported between CTD and bottle data.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Data coverage is limited to a specific three-week voyage in the Southern Ocean.
Provenance
- Source
- Australian Ocean Data Network via data_gov_au, collected by CSIRO National Collections and Marine Infrastructure (NCMI) Information and Data Centre (IDC).
- Collection Method
- Acquired using a Sea-Bird SBE911 CTD unit #22 with a rosette sampler during the RV Investigator voyage IN2025_V02.
- Time Range
- March 26, 2025 to April 14, 2025 (AEST).
- Freshness
- Last updated 2026-06-27 18:11:11.165075; freshness should be verified.
- Geography
- Southern Ocean, departing from and returning to Hobart, Tasmania.